Coverity: Fix null dereference in WebPluginDelegatePepper::Device3DInitializeContext error case.

chrome/renderer/webplugin_delegate_pepper.cc

Index: chrome/renderer/webplugin_delegate_pepper.cc
diff --git a/chrome/renderer/webplugin_delegate_pepper.cc b/chrome/renderer/webplugin_delegate_pepper.cc
index 05e57620ef324904cece1248f2cee564060f1f05..94753f62d5ad7de21c6651e0451396c39caab32a 100644
--- a/chrome/renderer/webplugin_delegate_pepper.cc
+++ b/chrome/renderer/webplugin_delegate_pepper.cc
@@ -719,10 +719,10 @@ NPError WebPluginDelegatePepper::Device3DInitializeContext(
 
         return NPERR_NO_ERROR;
       }
-    }
 
-    nested_delegate_->DestroyCommandBuffer(command_buffer_);
-    command_buffer_ = NULL;
+      nested_delegate_->DestroyCommandBuffer(command_buffer_);
+      command_buffer_ = NULL;
+    }
   }
 
   nested_delegate_->PluginDestroyed();